GtkBuildable

GtkBuildable — Interface for objects that can be built by GtkBuilder

Synopsis


#include <gtk/gtk.h>

                    GtkBuildable;
                    GtkBuildableIface;
void                gtk_buildable_set_name              (GtkBuildable *buildable,
                                                         const gchar *name);
const gchar*        gtk_buildable_get_name              (GtkBuildable *buildable);
void                gtk_buildable_add_child             (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *type);
void                gtk_buildable_set_buildable_property
                                                        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name,
                                                         const GValue *value);
GObject*            gtk_buildable_construct_child       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name);
gboolean            gtk_buildable_custom_tag_start      (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         GMarkupParser *parser,
                                                         gpointer *data);
void                gtk_buildable_custom_tag_end        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer *data);
void                gtk_buildable_custom_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer data);
void                gtk_buildable_parser_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder);
GObject*            gtk_buildable_get_internal_child    (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *childname);

Object Hierarchy

  GInterface
   +----GtkBuildable

Known Implementations

GtkBuildable is implemented by GtkListItem, GtkBin, GtkTreeView, GtkButtonBox, GtkPaned, GtkColorSelectionDialog, GtkVButtonBox, GtkTearoffMenuItem, GtkEntry, GtkOptionMenu, GtkImage, GtkCalendar, GtkFixed, GtkLinkButton, GtkHButtonBox, GtkInputDialog, GtkRadioButton, GtkVRuler, GtkVSeparator, GtkVBox, GtkCurve, GtkRadioToolButton, GtkHRuler, GtkToggleButton, GtkSeparatorMenuItem, GtkHScale, GtkTable, GtkTreeViewColumn, GtkImageMenuItem, GtkFileChooserButton, GtkCheckButton, GtkRadioMenuItem, GtkMenuShell, GtkStatusbar, GtkDrawingArea, GtkButton, GtkIconView, GtkNotebook, GtkUIManager, GtkTree, GtkSocket, GtkVScale, GtkProgress, GtkGammaCurve, GtkText, GtkCList, GtkAlignment, GtkMenuToolButton, GtkMenuItem, GtkPageSetupUnixDialog, GtkRecentChooserMenu, GtkToolItem, GtkHSeparator, GtkProgressBar, GtkCTree, GtkActionGroup, GtkRange, GtkAssistant, GtkFileSelection, GtkToolbar, GtkTreeItem, GtkAccelLabel, GtkPreview, GtkRecentChooserDialog, GtkExpander, GtkScale, GtkTreeStore, GtkMessageDialog, GtkSeparator, GtkLayout, GtkFontSelection, GtkCellView, GtkInvisible, GtkWindow, GtkSeparatorToolItem, GtkFileChooserWidget, GtkCheckMenuItem, GtkToolButton, GtkMisc, GtkEventBox, GtkFontButton, GtkEntryCompletion, GtkDialog, GtkHBox, GtkCombo, GtkOldEditable, GtkAspectFrame, GtkAboutDialog, GtkHScrollbar, GtkListStore, GtkScaleButton, GtkRecentChooserWidget, GtkToggleToolButton, GtkComboBox, GtkVScrollbar, GtkFrame, GtkSpinButton, GtkList, GtkLabel, GtkFontSelectionDialog, GtkTipsQuery, GtkColorSelection, GtkItem, GtkWidget, GtkRecentAction, GtkVolumeButton, GtkMenuBar, GtkTextView, GtkArrow, GtkToggleAction, GtkRadioAction, GtkPlug, GtkHPaned, GtkBox, GtkMenu, GtkAction, GtkPrintUnixDialog, GtkComboBoxEntry, GtkColorButton, GtkPixmap, GtkFileChooserDialog, GtkRuler, GtkVPaned, GtkHandleBox, GtkScrollbar, GtkContainer, GtkSizeGroup, GtkViewport and GtkScrolledWindow.

Description

In order to allow construction from a GtkBuilder UI description, an object class must implement the GtkBuildable interface. The interface includes methods for setting names and properties of objects, parsing custom tags, constructing child objects.

The GtkBuildable interface is implemented by all widgets and many of the non-widget objects that are provided by GTK+. The main user of this interface is GtkBuilder, there should be very little need for applications to call any gtk_buildable_... functions.

Details

GtkBuildable

typedef struct _GtkBuildable GtkBuildable;


GtkBuildableIface

typedef struct {
  GTypeInterface g_iface;

  /* virtual table */
  void          (* set_name)               (GtkBuildable  *buildable,
                                            const gchar   *name);
  const gchar * (* get_name)               (GtkBuildable  *buildable);
  void          (* add_child)              (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *type);
  void          (* set_buildable_property) (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    const gchar   *name,
					    const GValue  *value);
  GObject *     (* construct_child)        (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    const gchar   *name);
  gboolean      (* custom_tag_start)       (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *tagname,
					    GMarkupParser *parser,
					    gpointer      *data);
  void          (* custom_tag_end)         (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *tagname,
					    gpointer      *data);
  void          (* custom_finished)        (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    GObject       *child,
					    const gchar   *tagname,
					    gpointer       data);
  void          (* parser_finished)        (GtkBuildable  *buildable,
					    GtkBuilder    *builder);

  GObject *     (* get_internal_child)     (GtkBuildable  *buildable,
					    GtkBuilder    *builder,
					    const gchar   *childname);
} GtkBuildableIface;

The GtkBuildableIface interface contains method that are necessary to allow GtkBuilder to construct an object from a GtkBuilder UI definition.

GTypeInterface g_iface; the parent class
set_name () Stores the name attribute given in the GtkBuilder UI definition. GtkWidget maps this to the "name" property, and gtk_buildable_set_name() has a fallback implementation that stores the name as object data. Implement this method if your object has some notion of "name" and it makes sense to map the XML name attribute to it.
get_name () The getter corresponding to set_name. Implement this if you implement set_name.
add_child () Adds a child. The type parameter can be used to differentiate the kind of child. GtkContainer implements this to add add a child widget to the container, GtkNotebook uses the type to distinguish between page labels (of type "page-label") and normal children.
set_buildable_property () Sets a property of a buildable object. It is normally not necessary to implement this, g_object_set_property() is used by default. GtkWindow implements this to delay showing itself (i.e. setting the "visible" property) until the whole interface is created.
construct_child () Constructs a child of a buildable that has been specified as "constructor" in the UI definition. GtkUIManager implements this to reference to a widget created in a <ui> tag which is outside of the normal GtkBuilder UI definition hierarchy. A reference to the constructed object is returned and becomes owned by the caller.
custom_tag_start () Implement this if the buildable needs to parse content below <child>. To handle an element, the implementation must fill in the parser structure and user_data and return TRUE. GtkWidget implements this to parse keyboard accelerators specified in <accelerator> elements. GtkContainer implements it to map properties defined via <packing> elements to child properties. Note that user_data must be freed in custom_tag_end or custom_finished.
custom_tag_end () Called for the end tag of each custom element that is handled by the buildable (see custom_tag_start).
custom_finished () Called for each custom tag handled by the buildable when the builder finishes parsing (see custom_tag_start)
parser_finished () Called when a builder finishes the parsing of a UI definition. It is normally not necessary to implement this, unless you need to perform special cleanup actions. GtkWindow sets the "visible" property here.
get_internal_child () Returns an internal child of a buildable. GtkDialog implements this to give access to its vbox, making it possible to add children to the vbox in a UI definition. Implement this if the buildable has internal children that may need to be accessed from a UI definition.

gtk_buildable_set_name ()

void                gtk_buildable_set_name              (GtkBuildable *buildable,
                                                         const gchar *name);

Sets the name of the buildable object.

buildable : a GtkBuildable
name : name to set

Since 2.12


gtk_buildable_get_name ()

const gchar*        gtk_buildable_get_name              (GtkBuildable *buildable);

Gets the name of the buildable object.

GtkBuilder sets the name based on the the GtkBuilder UI definition used to construct the buildable.

buildable : a GtkBuildable
Returns : the name set with gtk_buildable_set_name()

Since 2.12


gtk_buildable_add_child ()

void                gtk_buildable_add_child             (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *type);

Adds a child to buildable. type is an optional string describing how the child should be added.

buildable : a GtkBuildable
builder : a GtkBuilder
child : child to add
type : kind of child or NULL

Since 2.12


gtk_buildable_set_buildable_property ()

void                gtk_buildable_set_buildable_property
                                                        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name,
                                                         const GValue *value);

Sets the property name name to value on the buildable object.

buildable : a GtkBuildable
builder : a GtkBuilder
name : name of property
value : value of property

Since 2.12


gtk_buildable_construct_child ()

GObject*            gtk_buildable_construct_child       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *name);

Constructs a child of buildable with the name name.

GtkBuilder calls this function if a "constructor" has been specified in the UI definition.

buildable : A GtkBuildable
builder : GtkBuilder used to construct this object
name : name of child to construct
Returns : the constructed child

Since 2.12


gtk_buildable_custom_tag_start ()

gboolean            gtk_buildable_custom_tag_start      (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         GMarkupParser *parser,
                                                         gpointer *data);

This is called for each unknown element under <child>.

buildable : a GtkBuildable
builder : a GtkBuilder used to construct this object
child : child object or NULL for non-child tags
tagname : name of tag
parser : a GMarkupParser structure to fill in
data : return location for user data that will be passed in to parser functions
Returns : TRUE if a object has a custom implementation, FALSE if it doesn't.

Since 2.12


gtk_buildable_custom_tag_end ()

void                gtk_buildable_custom_tag_end        (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer *data);

This is called at the end of each custom element handled by the buildable.

buildable : A GtkBuildable
builder : GtkBuilder used to construct this object
child : child object or NULL for non-child tags
tagname : name of tag
data : user data that will be passed in to parser functions

Since 2.12


gtk_buildable_custom_finished ()

void                gtk_buildable_custom_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         GObject *child,
                                                         const gchar *tagname,
                                                         gpointer data);

This is similar to gtk_buildable_parser_finished() but is called once for each custom tag handled by the buildable.

buildable : a GtkBuildable
builder : a GtkBuilder
child : child object or NULL for non-child tags
tagname : the name of the tag
data : user data created in custom_tag_start

Since 2.12


gtk_buildable_parser_finished ()

void                gtk_buildable_parser_finished       (GtkBuildable *buildable,
                                                         GtkBuilder *builder);

Called when the builder finishes the parsing of a GtkBuilder UI definition. Note that this will be called once for each time gtk_builder_add_from_file() or gtk_builder_add_from_string() is called on a builder.

buildable : a GtkBuildable
builder : a GtkBuilder

Since 2.12


gtk_buildable_get_internal_child ()

GObject*            gtk_buildable_get_internal_child    (GtkBuildable *buildable,
                                                         GtkBuilder *builder,
                                                         const gchar *childname);

Get the internal child called childname of the buildable object.

buildable : a GtkBuildable
builder : a GtkBuilder
childname : name of child
Returns : the internal child of the buildable object

Since 2.12